Metal-Free Chlorodeboronation of Organotrifluoroborates
摘要:
A mild and metal-free method for the chlorodeboronation of organotrifluoroborates using trichloroisocyanuric acid (TCICA) was developed. Aryl-, heteroaryl-, alkenyl-, alkynyl-, and alkyltrifluoroborates were converted into the corresponding chlorinated products in good yields. This method proved to be tolerant of a broad range of functional groups.
Highly Selective Palladium-Catalyzed Cross-Coupling of Secondary Alkylzinc Reagents with Heteroaryl Halides
作者:Yang Yang、Katrin Niedermann、Chong Han、Stephen L. Buchwald
DOI:10.1021/ol502230p
日期:2014.9.5
The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroarylhalides is described. The development of a series of biarylphosphine ligands has led to the identification of an improved catalyst for the coupling of electron-deficient heterocyclic substrates. Preparation and characterization of oxidative addition complex (L)(Ar)PdBr provided insight into the
描述了仲烷基锌试剂与杂芳基卤化物的高选择性钯催化 Negishi 偶联。一系列联芳基膦配体的开发导致鉴定出一种用于缺电子杂环底物偶联的改进催化剂。氧化加成配合物 ( L )(Ar)PdBr 的制备和表征提供了洞察基于 CPhos 型配体的催化剂在促进具有挑战性的还原消除过程中的独特反应性。
Discovery of a novel dual-target inhibitor of CDK12 and PARP1 that induces synthetic lethality for treatment of triple-negative breast cancer
inhibited the proliferation of TNBC cells. Then, a series of small molecule inhibitors targeting both CDK12 and PARP1 were designed and synthesized. The new dual-target inhibitor (12e) showed potent inhibitory activity against CDK12 (IC50 = 285 nM) and PARP1 (IC50 = 34 nM), as well as good anti-proliferative effects in TNBC cell lines. Meanwhile, compound 12e showed favorable synergistic anti-tumor efficacy